GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2001 🢒 LeSabre 🢒 Restraints 🢒 SIR 🢒 Inflatable Restraint Front End Discriminating Sensor Replacement

Removal Procedure

Caution: Be careful when you handle a sensor. Do not strike or jolt a sensor. Before applying power to a sensor:

   • Remove any dirt, grease, etc. from the mounting surface.
   • Position the sensor horizontally on the mounting surface.
   • Point the arrow on the sensor toward the front of the vehicle.
   • Tighten all of the sensor fasteners and sensor bracket fasteners to the specified torque value.
Failure to follow the correct procedure could cause air bag deployment, personal injury, or unnecessary SIR system repairs.


    Object Number: 709876 Size: SH
  1. Disable the SIR system. Refer to Disabling the SIR System .
  2. Remove the front air deflector. Refer to Front Air Deflector Replacement in Body Front End.
  3. Remove the connector position assurance (CPA) (5) from the inflatable restraint front end discriminating sensor wiring harness connector (4).
  4. Disconnect the inflatable restraint front end discriminating sensor wiring harness connector (4) from the inflatable restraint front end discriminating sensor (1).

    5. Important: The inflatable restraint front end discriminating sensor mounting fastener (3) has left handed threads.

  5. Through the access hole located in the bottom of the lower tie bar, loosen the inflatable restraint front end discriminating sensor mounting fastener (3).
  6. Remove the inflatable restraint front end discriminating sensor (1) from the lower tie bar by lifting upward and sliding rearward out of the key hole slot (2).

Installation Procedure

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.


    Object Number: 709876 Size: SH
  1. Install the inflatable restraint front end discriminating sensor (1) into the key hole slot (2) located in the lower tie bar.

    2. Tighten
    Tighten the fastener (3) to 9 N·m (80 lb in).

  2. Connect the inflatable restraint front end discriminating sensor harness wiring connector (4) to the inflatable restraint front end discriminating sensor (1).
  3. Install the connector position assurance (CPA) (5) to the inflatable restraint front end discriminating sensor wiring harness connector (4).
  4. Install the front air deflector. Refer to Front Air Deflector Replacement in Body Front End.
  5. Enable the SIR system. Refer to Enabling the SIR System .